A portable fiber optic sensor for the luminescent sensing of cobalt ions using carbon dots

Crawford, Scott E.; Kim, Ki Joong; Baltrus, John P.

doi:10.1039/d2tc02560d

Cited by 13 publications

(5 citation statements)

References 83 publications

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“…A de ciency of Co 2+ can result in health issues such as anemia, reduced appetite, vasodilatation, and cardiomyopathy [36][37][38][39][40][41][42][43][44]. Cobalt can enter the human body through various routes, including the consumption of contaminated food, inhalation of polluted air, ingestion of water with elevated cobalt levels, or occupational exposure in industries like hard metal production, diamond polishing, porcelain manufacturing, chemicals, and pharmaceuticals [45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Ratiometric Fluorescence and Chromogenic Probe for Trace Detection of Selected Transition Metals

Saleem,

Hussain,

Rauf

et al. 2024

J Fluoresc

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The design and development of a uorescence sensor aimed at detecting and quantifying trace amounts of toxic transition metal ions within environmental, biological, and aquatic samples has garnered signi cant attention from diagnostic and testing laboratories, driven by the imperative to mitigate the health risks associated with these contaminants. In this context, we present the utilization of a heterocyclic symmetrical Schiff Base derivative for the purpose of uorogenic and chromogenic detection of Co 2+ , Cu 2+ and Hg 2+ ions. The characterization of the ligand involved a comprehensive array of techniques, including physical assessments, optical analyses, NMR, FT-IR, and Mass Spectrometric examinations. The mechanism of ligand-metal complexation was elucidated through the utilization of photophysical parameters and FT-IR spectroscopic analysis, both before and after the interaction between the ligand and the metal salt solution. The pronounced alterations observed in absorption and uorescence spectra, along with the distinctive chromogenic changes, following treatment with Co 2+ , Cu 2+ and Hg 2+ , a rm the successful formation of complexes between the ligands and the treated metal ions. Notably, the receptor's complexation response exhibited selectivity towards Co(II), Cu(II), and Hg(II), with no observed chromogenic changes, spectral variations, or band shifts for the various tested metal ions, including

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Section: Introductionmentioning

confidence: 99%

Ratiometric Fluorescence and Chromogenic Probe for Trace Detection of Selected Transition Metals

Saleem,

Hussain,

Rauf

et al. 2024

J Fluoresc

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“…S1†). The lab-built fiber optic system 9,10 was initially tested on aqueous solutions of four visible-emitting REEs: terbium, europium, samarium, and dysprosium in solution and after drying the fiber-optic tip following REE exposure (Scheme 1). Characteristic emission peaks were observed from each of the REEs; this emission resulted from energy transfer from the immobilized BTC-1 MOF to the encapsulated REE cations, which are absorbed by the anionic MOF.…”

Section: Resultsmentioning

confidence: 99%

“…7,8 Luminescence-based sensors offer an attractive alternative due to their low instrumentation costs, ease-ofuse, high sensitivity, and portability, facilitating transport into the field and between labs. [7][8][9][10][11] Moreover, REEs are a particularly suitable sensing target because, unlike other metals, several REEs are inherently luminescent: REE emission bands are narrow, element distinct and wellresolved from one another, enabling multiple metals to be detected and distinguished simultaneously. 2,12 However, the optical transitions that give rise to these emission bands are parity forbidden, rendering direct excitation inefficient.…”

Section: Introductionmentioning

confidence: 99%

Zinc adeninate metal–organic framework-coated optical fibers for enhanced luminescence-based detection of rare earth elements

Crawford,

Burgess,

Kim

et al. 2024

RSC Appl. Interfaces

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“…However, blue emission was observed immediately upon the addition of water (Video S1). The “Off-On” emission could be induced by drying and wetting the thin film across multiple cycles (Figure S6), and the emission spectra were recorded using a custom built, portable fiber optic spectrometer − (Scheme S1, full details in the Experimental Section). To further probe the impact of solvent properties on the thin film’s luminescence, 100 μL aliquots of various solvents were dropcast onto the film.…”

Section: Resultsmentioning

confidence: 99%

Efficient and Rapid Synthesis of a Solvent and Ion-Responsive Luminescent Copper 2-Aminoterephthalate Thin Film

Crawford

Kim

Diemler

et al. 2023

ACS Appl. Opt. Mater.

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Metal–organic coordination polymers are promising optical sensing materials due to their tunable physical and chemical properties, which can be controlled through careful selection of metal centers, organic linkers, and/or reaction conditions. The fabrication of coordination polymers in thin film form is particularly desirable for sensor development because it facilitates integration with sensing platforms such as optical fibers, enables sensing material recovery and regeneration, and can enhance analyte uptake during analysis. However, many thin film fabrication techniques are tedious and require high temperatures and/or expensive equipment, creating a significant barrier toward scalable production. Here, coordination polymer thin films comprised of copper and 2-aminoterepthalic acid are selectively grown within 30 min at room temperature and under ambient atmosphere using an aluminum-doped zinc oxide template, circumventing the long time and high equipment costs typically associated with thin film production. The films luminesce in the presence of polar protic solvents and exhibit enhanced emission in the presence of aluminum(III) ions, an economically critical metal according to the 2022 United States Geological Survey. The “turn on” luminescent response to aluminum is selective against 15 other metal ions commonly found in environmental streams, and is highly sensitive, with estimated detection limits down to 120 parts-per-billion in water. As a proof-of-concept, the films were evaluated on diluted fly ash streams, with luminescent signals that qualitatively correlate with inductively coupled plasma mass-spectrometry analysis. Taken together, this work presents a promising route toward the scalable production of optically active coordination polymer films.

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A portable fiber optic sensor for the luminescent sensing of cobalt ions using carbon dots

Abstract: Cobalt is crucial to renewable energy technologies, but production is hindered by high characterization costs. This work presents a portable, low cost sensing platform that rapidly detects low part-per-million levels of cobalt in complex matrices.

Cited by 13 publications

References 83 publications

Ratiometric Fluorescence and Chromogenic Probe for Trace Detection of Selected Transition Metals

Ratiometric Fluorescence and Chromogenic Probe for Trace Detection of Selected Transition Metals

Zinc adeninate metal–organic framework-coated optical fibers for enhanced luminescence-based detection of rare earth elements

Efficient and Rapid Synthesis of a Solvent and Ion-Responsive Luminescent Copper 2-Aminoterephthalate Thin Film

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